Collenchyma differs from sclerenchyma in -a)Retaining protoplasm at maturityb)Having thick wallsc)Having a wide lumend)Being meristematicCorrect answer is option 'A'. Can you explain this answer?

Question

Accepted Answer

Collenchyma tissue is composed of elongated cells with irregularly thickened walls. They provide structural support and flexibility to the growing stems.

Sclerenchyma is the supporting tissue in plants. It is composed of dead cells which is completely devoid of protoplasm.

Therefore, the correct answer is option A.

Answer

Since sclerenchyma is a dead tissue, it doesn't retain protoplasm but collenchyma does. (protoplasm = cytoplasm + nucleus + cell organelles)

Answer

Collenchyma differs from sclerenchyma in retaining protoplasm at maturity.

Introduction:
Collenchyma and sclerenchyma are two types of plant tissues that provide structural support to the plant. They both have thick cell walls, but they differ in certain characteristics.

Differences between collenchyma and sclerenchyma:

1. Protoplasm at maturity:
- Collenchyma cells retain their protoplasm (living contents) at maturity, whereas sclerenchyma cells lose their protoplasm and become dead cells.
- The presence of protoplasm in collenchyma cells allows them to perform metabolic functions and provide mechanical support to growing plant parts.

2. Cell wall:
- Both collenchyma and sclerenchyma cells have thick cell walls, but the composition of the cell wall differs.
- Collenchyma cell walls are primarily composed of cellulose, hemicellulose, and pectin. These components make the cell wall flexible and provide tensile strength.
- Sclerenchyma cell walls are composed of lignin, a complex polymer that makes the cell wall rigid and provides compressive strength. The presence of lignin makes sclerenchyma cells dead and unable to elongate.

3. Shape and arrangement:
- Collenchyma cells are elongated and have irregularly thickened cell walls. They are often found in the corners of plant organs, such as stems and petioles.
- Sclerenchyma cells are usually shorter and have uniformly thickened cell walls. They are commonly found in regions where there is a need for mechanical support, such as the vascular bundles and seed coats.

4. Function:
- Collenchyma cells provide mechanical support to growing plant parts and help in the elongation of stems and petioles. They can also store water and nutrients.
- Sclerenchyma cells provide structural support to mature plant parts and protect delicate tissues. They are involved in providing rigidity to the plant and preventing wilting or collapsing.

Conclusion:
In conclusion, collenchyma and sclerenchyma differ in their ability to retain protoplasm at maturity. Collenchyma cells retain their protoplasm, allowing them to perform metabolic functions and provide support to growing plant parts. On the other hand, sclerenchyma cells lose their protoplasm and become dead cells with rigid cell walls, providing structural support to mature plant parts.

Similar NEET Doubts

Embryo of a seed is made up of

Collenchyma differ from sclerenchyma

Which among the following is incorrect about tissues in a plant?

In one tissue, the cells are isodiametric, walls are thin and made up of cellulose and the other consists of long, narrow cells with thick and lignified cell walls. They are

Which among the following is incorrect about tissues in a plant?

Top Courses for NEETView all

Biology Class 11

Daily Test for NEET Preparation

NEET Mock Test Series 2025

Topic-wise MCQ Tests for NEET

DPP: Daily Practice Problems for NEET

Top Courses for NEET

Top Courses for NEET

Related Content

About NEET

NEET Preparation Material

How to Prepare for NEET Exam?

NCERT Based Study Material

NEET Mock Tests

Other Popular Exams

Company